Quote:
Originally Posted by Isaac Zachary
How to get better fuel mileage in a: - Full size SUV
- that needs to go 85mph to 90mph
- on a 90 mile per day route
- with fuel costs at $6.39 per gallon.
. . . |
I checked Wiki, is this:
In 2008, a two mode hybrid was offered with two trim levels, HY1 or HY2. A 332 hp (248 kW) 6.0L Vortec 6000 with a pair of 80-hp, 184 ft.-lb. torque electric motors was offered. It had a 0.36 to 0.34 drag coefficient from upgraded body panels and a 12V/300V battery system. The hybrid models also included 300V Electric AC, 42V power steering, and LED taillights (only an option from 2008 to 2013).
I also found an interesting description in Wiki:
https://en.wikipedia.org/wiki/Global_Hybrid_Cooperation
It uses 2 or 3 planetary gearsets in an automatic transmission: one on the internal combustion engine (ICE) side (input split) paired with a second (output split), forming the compound split, and possibly one third additional planetary gearset to multiply the number of fixed gear ratios (up to 4).
Is this the "2WD" version?
Limiting to just "aerodynamic" modifications risks "polishing the musket balls." I prefer tuning the whole vehicle. Regardless, can you share front, side, underbody, and top photos?
- front - evaluate cooling air inlet and air flow
- side - the wheels and wheel covers
- underbody - how draggy that side looks
- top - looking for drag sources
It helps if you have tools needed for any tuning:
- What vehicle instrumentation do you have and are willing to use?
- Do you have a video camera to investigate air flow?
What is your improvement expectation, when we can stop?
Redundant but I prefer to tune the whole system, not limited to just aerodynamics. Aerodynamic tuning can not overcome other low hanging fruit.
If you decide to do whole vehicle tuning, it may make more sense to start a fresh thread under "Hybrid" for a hybrid Tahoe.
Bob Wilson